-LRB- CNN -RRB- -- The death toll from a massive landslide that struck in Washington state 's Cascade Mountains rose Tuesday to 35 , the Snohomish County medical examiner said .

Eleven people are still missing after a rain-saturated hillside along the Stillaguamish River gave way on the outskirts of the rural town of Oso on March 22 .

The news came as the White House announced President Barack Obama will visit the area on April 22 , the one month anniversary of the slide , and meet with search crews .

`` First and foremost our thoughts and prayers go out to everyone who lost a loved one and those whose friends and family remain missing as a result of this devastating incident , '' White House Press Secretary Jay Carney told reporters .

Asked during the briefing if it would be a routine visit , Carney said `` the pain of the family members who loved ones is not routine . ''

`` It 's unique in each case and each instance , '' Carney said . `` And I think the President is as heartbroken by this event , as he has been on each occasion that something like this has happened in the country , where he traveled to participate in ceremonies or services that commemorate those lost and celebrate their lives . ''

Search crews continue to dig through deep , gelatinous mud and debris , which is 70 feet thick in some places , to search for the missing .

Of the 34 recovered bodies , 30 have been identified , the medical examiner said .

CNN 's Carma Hassan contributed to this report .

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NEW : Of the 35 bodies recovered , 31 have been identified , the medical examiner says

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NEW : 11 people are still missing , authorities say

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President Barack Obama will visit the area on April 22 , the one-month anniversary

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He will meet with search-and-recovery crews , the White House says